Volume controller using encoder

Abstract

The volume controller of the present invention does not require a use of an expensive main controller and a quartz oscillator to generate the pulse signals for regulating the volume. The volume controller can handle the noise generated by turning of an encoder and regulates the volume accurately despite the noise. As the volume is increased, a first pulse signal generating circuitry generates pulse signals with an already established width according to the pulse signals of the encoder. As the volume is decreased, a second pulse signal generating circuitry generates pulse signals with already established width according to the pulse signals of the encoder. The first or the second pulse signal generating circuitry will act optionally according to the increase or decrease of the volume. When the first or the second pulse generating means are optional and yet generates the pulse signal, the control means will disconnect the standard terminal of the encoder that is not to be grounded. This will keep the encoder from generating the pulse signal. And the volume removal integrated circuit will regulate the volume according to the pulse signal of the first or the second pulse signal generating circuitry.

What is claimed is: 
     
       1. A volume regulator of an electronic voice output machine using separate pulse generations for increasing and decreasing volume, comprising: an encoder having first and second output terminals, the encoder generating a first plurality of output signals from the first and second output terminals with a phase difference of ninety degrees between the first and the second output terminals, the encoder generating the first plurality of output signals in dependence upon instructions from a user regulating a volume;   a first pulse signal generating means generating a first plurality of pulse signals in dependence upon the output signals of said encoder when increasing the volume and not generating the first plurality of pulse signals when decreasing the volume;   a second pulse signal generating means generating a second plurality of pulse signals in dependence upon the output signals of said encoder when decreasing the volume and not generating the second plurality of pulse signals when increasing the volume;   a control means to prevent said encoder from generating the output signals when one of the first and second pulse signal generating means is generating the pulse signals; and   a volume removal integrated circuit increasing and decreasing the volume in dependence upon the pulse signals generated by the first and second pulse signal generating means.   
     
     
       2. The volume regulator of claim 1, further comprising: a first noise removal capacitor connecting said encoder and said first pulse signal generating means, said first capacitor filtering transmissions on a line connecting said encoder and said first pulse signal generating means; and   a second noise removal capacitor connecting said encoder and said second pulse signal generating means, said second capacitor filtering transmissions on a line connecting said encoder and said first pulse signal generating means.   
     
     
       3. The volume regulator of claim 1, further comprising: said first pulse signal generating means comprising a first monostable multivibrator generating a first plurality of monostable signals with     a first plurality of predetermined pulse widths, said first pulse signal generating means being cleared in dependence upon the output signals generated from the first output terminal of said encoder and being triggered in dependence upon the output signals generated from the second output terminal of said encoder, and a first inverter inverting the first plurality of monostable signals of said first monostable multivibrator into the first plurality of pulse signals and transmitting the first plurality of pulse signals to a first input terminal of said volume removal integrated circuit; and     said second pulse signal generating means comprising a second monostable multivibrator generating a second plurality of monostable signals with a second plurality of predetermined pulse widths, said second pulse signal generating means being cleared in dependence upon the output signals generated from the first output terminal of said encoder and being triggered in dependence upon the output signals generated from the second output terminal of said encoder, and   a second inverter inverting the second plurality of monostable signals of said second monostable multivibrator into the second plurality of pulse signals and transmitting the second plurality of pulse signals to a second input terminal of said volume removal integrated circuit.     
     
     
       4. The volume regulator of claim 1, wherein said control means controls the connection and the disconnection of a standard terminal of said encoder to ground. 
     
     
       5. The volume regulator of claim 4, wherein said control means comprises: an AND gate receiving the pulse signals from the first and second pulse signal generating means and generating a transistor control signal by logically adding the pulse signals received from the first and second signal generating means; and   a transistor connecting and disconnecting the standard terminal of said encoder, in dependence upon the transistor control signal received from said AND gate.   
     
     
       6. The volume regulator of claim 5, wherein said AND gate comprises: a first diode connected to the first pulse signal generating means; and   a second diode connected to the second pulse signal generating means.   
     
     
       7. A method of regulating volume, comprising the steps of: generating a first plurality of output signals from first and second output terminals with a phase difference of ninety degrees between the first and the second output terminals, said generating in dependence upon instructions from a user regulating the volume;   generating a first plurality of pulse signals in dependence upon the output signals generated during the step of generating the output signals from the first and second output terminals when increasing the volume, and not generating the first plurality of pulse signals when decreasing the volume;   generating a second plurality of pulse signals in dependence upon the output signals generated during the step of generating the output signals from the first and second output terminals when decreasing the volume, and not generating the second plurality of pulse signals when increasing the volume;   preventing from generating the output signals during the steps of generating the first plurality of pulse signals and generating the second plurality of pulse signals; and   increasing and decreasing the volume in dependence upon the pulse signals generated during the steps of generating the first plurality of pulse signals and generating the second plurality of pulse signals.   
     
     
       8. A volume regulator comprising: an encoder having first and second output terminals;   a volume removal integrated circuit to control volume;   first pulse signal generating means comprising a first monostable multivibrator generating a first plurality of monostable signals with a first plurality of predetermined pulse widths, said first pulse signal generating means being cleared in dependence upon output signals generated from the first output terminal of said encoder and being triggered in dependence upon output signals generated from the second output terminal of said encoder, and   a first inverter inverting the first plurality of monostable signals of said first monostable multivibrator into the first plurality of pulse signals and transmitting the first plurality of pulse signals to a first input terminal of said volume removal integrated circuit; and     second pulse signal generating means comprising a second monostable multivibrator generating a second plurality of monostable signals with a second plurality of predetermined pulse widths, said second pulse signal generating means being cleared in dependence upon the output signals generated from the first output terminal of said encoder and being triggered in dependence upon the output signals generated from the second output terminal of said encoder, and   a second inverter inverting the second plurality of monostable signals of said second monostable multivibrator into the second plurality of pulse signals and transmitting the second plurality of pulse signals to a second input terminal of said volume removal integrated circuit.     
     
     
       9. The volume regulator of claim 8, comprising control means to prevent said encoder from generating the output signals when one of the first and second pulse signal generating means is generating the pulse signals. 
     
     
       10. The volume regulator of claim 8, further comprising: a first noise removal capacitor connecting said encoder and said first pulse signal generating means, said first capacitor filtering transmissions on a line connecting said encoder and said first pulse signal generating means; and   a second noise removal capacitor connecting said encoder and said second pulse signal generating means, said second capacitor filtering transmissions on a line connecting said encoder and said first pulse signal generating means.   
     
     
       11. The volume regulator of claim 9, further comprising: a first noise removal capacitor connecting said encoder and said first pulse signal generating means, said first capacitor filtering transmissions on a line connecting said encoder and said first pulse signal generating means; and   a second noise removal capacitor connecting said encoder and said second pulse signal generating means, said second capacitor filtering transmissions on a line connecting said encoder and said first pulse signal generating means.   
     
     
       12. The volume regulator of claim 9, wherein said control means controls the connection and the disconnection of a standard terminal of said encoder to ground. 
     
     
       13. The volume regulator of claim 9, wherein said control means comprises: an AND gate receiving the pulse signals from the first and second pulse signal generating means and generating a transistor control signal by logically adding the pulse signals received from the first and second signal generating means; and   a transistor connecting and disconnecting the standard terminal of said encoder, in dependence upon the transistor control signal received from said AND gate.   
     
     
       14. The volume regulator of claim 12, wherein said control means comprises: an AND gate receiving the pulse signals from the first and second pulse signal generating means and generating a transistor control signal by logically adding the pulse signals received from the first and second signal generating means; and   a transistor connecting and disconnecting the standard terminal of said encoder, in dependence upon the transistor control signal received from said AND gate.   
     
     
       15. The volume regulator of claim 13, wherein said AND gate comprises: a first diode connected to the first pulse signal generating means; and   a second diode connected to the second pulse signal generating means.   
     
     
       16. The volume regulator of claim 14, wherein said AND gate comprises: a first diode connected to the first pulse signal generating means; and   a second diode connected to the second pulse signal generating means.